Dybala Corporation's produces and sells a single product. Data concerning that product appear below:

	Per Unit	Percent of Sales
Selling price	$160	100%
Variable expenses	80	50%
Contribution margin	$ 80	50%

The company is currently selling 5,200 units per month. Fixed expenses are $359,000 per month. The marketing manager believes that a $6,200 increase in the monthly advertising budget would result in a 170 unit increase in monthly sales. What should be the overall effect on the company's monthly net operating income of this change?

Increase of $13,600

Decrease of $6,200

Increase of $7,400

Decrease of $7,400